In an interview with Al Sharq Al Awsat, an Arabic-language newspaper, Saudi Arabia's Foreign Minister Adel al-Jubeir dismissed the allegations that Crown Prince Mohammad bin Salman had orchestrated the killing of Jamal Khashoggi as "false".
In the wake of published reports that the Central Intelligence Agency believed Saudi Crown Prince Mohammed bin Salman had personally ordered Khashoggi's murder in Turkey in October, Wyden said USA spy chiefs should "come out and provide the American people and the Congress with a public assessment of who ordered the killing".
He would not say whether the crown prince is among them.
Maas says the 18 are Saudis who are "allegedly connected to this crime" but gave no further information.
Over the weekend, Trump called reports that the crown prince ordered the killing "premature".
The Houthi movement also said it was ready for a broader ceasefire if the coalition "wants peace".
The CIA is said to have concluded that the crown prince was behind the killing, but US President Donald Trump is yet to endorse the assessment. He said European Union states expressed "great support" for the decision when he briefed them in Brussels on Monday.
He said CIA Director Gina Haspel and National Intelligence Director Dan Coats need to "come out and provide the American people and the Congress with a public assessment of who ordered the killing of Jamal Khashoggi".
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The last time we played in Brisbane and not Perth. "It won't be easy but we have some quality in our group". I will do the same on Wednesday. "I've done well in limited-overs but the challenge is red-ball cricket".
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Netanyahu said that Israel faces a very delicate and complex security situation and warned against bringing down the government. He and Justice Minister Ayelet Shaked, also of Jewish Home, are set to deliver a statement to the media Monday.
US intelligence officials have concluded that the crown prince personally ordered the killing, and experts say such an operation is unlikely to have occurred without the knowledge of the crown prince, who controls all major levers of power in the kingdom. Others familiar with the case caution that while it's likely that the crown prince had a role in the death, there continue to be questions about the degree to which he was involved.
Turkey and Saudi Arabia say that after the agents killed Khashoggi, they then dismembered his body, which has not been found.
The president leaves Tuesday to spend Thanksgiving at his golf club in New Jersey.
Saudi-owned Al-Arabiya television reported the prince will attend the upcoming Group of 20 summit in Argentina, his first overseas trip since the murder.
In a parallel development, Saudi King Salman stood by his son, the crown prince, praising his social and economic reform programme, and lauding efforts of the public prosecution without directly addressing the killing of Khashoggi.
The United States has stepped up its opposition to Saudi Arabia's war against Houthi rebels in neighboring Yemen.
In recent weeks, Secretary of State Mike Pompeo and Defense Secretary Jim Mattis have called for a ceasefire in Yemen, and the US has announced it would stop refueling Saudi Arabian aircraft fighting the Houthis.
The Red Sea port of Hodeida, which is controlled by the Houthis and is a key point of entry for aid and imports to Yemen, has seen heavy fighting over the past weeks.